The one who pays the lightning invoice for an audio clip gets their npub encoded into the audio stream, right? That means people who download pirated audio files can actually verify that a particular audio file is pirated by their "trusted" pirate group or individual. This is not true for movies, games, and music right now, so there is no verifiable way to know the file you are downloading actually came from the group you think it came from. Someone could have repackaged it, put malware into the mix, and "shipped" it with the name of your favourite pirate group. There's no way to know for sure because no one uses public signatures for that stuff. Enter your tool. Now a pirate group can grow their notoriety verifiably by encoding their npub into all media files which go through your tool and people know for sure it came from them.